"Ethical", "feeling", "thinking", "logical" and "rational" are unfortunate terms that have connotations that are not necessarily a true depiction of what was intended by Socionics or Meyers-Briggs. They seem to imply that if one is not ethical, feeling, thinking, logical or rational then one must be the opposite - not true.

F (or ethical) and T (or logical) are both rationalization processes that operate on different sets of conditions. The differences in conditions can create significant differences in perspective and activity. T and F will draw divergent conclusions from the same set of circumstances. However, in many other scenarios, F and T may draw the same conclusion, but that conclusion would be based on much different criteria.

F is value driven rationalization. It is a logical process that operates on relative values. B values X more than C so X will be allotted to B. Even though X may be more valuable to B, C could have perhaps made better use of X. The decision has a logical premise; however, it may or may not have had the best possible outcome. Because people create "value", F demonstrates a personalized perspective of self and the external world that shows up in decision-making - that all problems can be solved when everyone recognizes the value in it. This doesn't imply that T would neglect values - there's utility in values.

T is utility driven rationalization. It is a logical process that operates on application of resources, which include people and self. B can make better use of X than can C, so X will be allotted to B. X may never be employed because B may not value X. Because C places more value on X, X might have actually been employed albeit in a less useful fashion. The decision might have considered the best interests of both B and C but it may or may not have had the best possible outcome. T demonstrates an impersonal perspective of self and the external world that shows up in decision-making - that all problems can be solved when the correct resources are applied to them. This doesn't imply that F would neglect utility – there's value in utility.

If N or S is the dominant function, T and F are forced to adapt to the input, which likely comes in free format. However, T and F still rationalize all the data albeit at times, are forced to do it out-of-the-box. If F or T is dominant, input is likely rearranged into a preconceived format - constrained by rationalized filters. All human output except for the most primal are created through rationalization processes. People may exhibit irrational, illogical or insensitive behaviour, or make irrational, illogical or insensitive decisions; however, that's human nature and can apply to anyone.